Chat with AIExam 9: Network Services
Describe static NAT.
(37) 
VerifiedStatic NAT is the simplest form of NAT, in which a single private IP address is mapped to a single public IP address. For example, a router could be configured to translate all communications from the internal 192.168.0.1 address to the address 209.86.192.197. In this way, when the host 192.168.0.1 accesses the Internet, the router will translate its IP address to 209.86.192.197. The router will then translate communications between that host and any system on the Internet. Therefore, all Internet devices will communicate with host 209.86.192.197, but the actual packets will be forwarded by the NAT router to host 192.168.0.1 on the local network. In order for the NAT router to translate communications between the internal and external network, it must maintain a table in memory that maps internal IP addresses to addresses presented to the Internet (external addresses). With static NAT, the mapping is one-to-one. For example, internal address 192.168.0.1 maps to 209.86.192.197, address 192.168.0.2 maps to 209.86.192.198, and so on.
Windows Internet Name Service (WINS) servers are not supported by Cisco routers.
(41) VerifiedFalse
The ____ command enables DNS if it has previously been disabled.
(39) VerifiedA
____ uses a one-to-one mapping or one-to-many mapping method to allow one or more private IP clients to gain access to the Internet by mapping the private IP addresses to public IP addresses.
(38) Cisco developed NAT, and today the technology is used by routers, firewalls, and even individual computers with multiple network connections.
(37) When monitoring DHCP, the best way to check the bindings is to execute the ____ command on the router.
(40) ____________________ occurs when the internal network has been incorrectly configured for an IP range that actually exists on the Internet (registered to another entity) or when two companies merge and each company was using the same private IP address range.
(23) NAT servers use ____ to send connections from external clients to the Web server on the internal network.
(35) NAT is defined in RFC ____, which describes methods for connecting private (internal) IP addresses to the Internet.
(39) Most people prefer to use names, not IP addresses, when communicating with network devices.
(31) To differentiate between the connections, ____ uses multiple public TCP and UDP ports to create unique sockets that map to internal IP addresses.
(34) Regarding SDM, you access the DHCP configuration area using the ____ button.
(29) When you launch the SDM program, you see the Home tab. To see all of the parameters that can be configured, click the ____ button.
(27) You could turn off the lookup feature on a Cisco router by using the ____ command.
(30) The ____ command is optional, but provides a domain suffix for the names.
(31) ____ must be used if you want clients outside your network to access services on your servers.
(39) ____ manages addressing by leasing the IP information to the hosts.
(41) 
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